Femtosecond lasers in fluid inclusion analysis: Three-dimensional imaging and determination of inclusion volume in quartz using second harmonic generation microscopy |
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| Institution: | 1. Institute of Applied Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland;2. LFA-Labor für Fluideinschluss-Analytik, Cäcilienrain 3, CH-3007 Bern, Switzerland;1. Institute of Mineralogy and Economic Geology, RWTH Aachen, Wüllnerstraße 2, 52062 Aachen, Germany;2. Department for Applied Geosciences and Geophysics, University of Leoben, Peter-Tunner-Straße 5, 8700 Leoben, Austria;3. Department of Geology, University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa;4. Department of Geological Sciences, University of Cape Town, Rondebosch 7701, South Africa;1. CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR China;2. Abteilung Geochemie, Geowissenschaftliches Zentrum der Universität Göttingen, Goldschmidtstr. 1, 37077 Göttingen, Germany;3. Abteilung Angewandte Geologie, Geowissenschaftliches Zentrum der Universität Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany;4. MOE Key Laboratory of Metallogenic Prediction of Nonferrous Metals, School of Geosciences and Info-Physics, Central South University, Changsha 410083, PR China;5. No.332 Geological Team, Bureau of Geology and Mineral Exploration of Anhui Province, Huangshan 245000, PR China;1. Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, USA;2. Department of Material Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA;1. Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996-2200, United States;2. Department of Material Science and Engineering, University of Tennessee, Knoxville, TN 37996-2200, United States;1. School of Materials Science and Engineering, Xi’an University of Technology, Jinhua Road 5, Xi''an 710048, PR China;2. AVIC Aircraft Co., LTD. Xi''an Brake branch, No. 5, Keji 7th Road, Xi''an 710075, China;3. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, PR China |
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| Abstract: | Optical second harmonic generation microscopy was used to generate three-dimensional images of fluid inclusions in quartz. Because the exciting light was focused with a high numerical aperture microscope objective, phase-matching conditions in the quartz led to the generation of frequency doubled light only at the surfaces of the fluid inclusions and not in the bulk material, providing an axial resolution of approximately 1 μm. The volume of synthetic two-phase water inclusions was determined from second harmonic images. The bubble volume was measured using brightfield microscopy (the sample was heated to ensure a smaller bubble that could take on a spherical shape inside the inclusion). The bulk molar volume was then calculated from the vapor–liquid ratio. The values obtained for the bulk molar volume were found to be in good agreement with values calculated from measurements of the homogenization temperature. |
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